Amazon is using its Price Check app for the iPhone to lure shoppers away from physical retail stores by offering tasty discounts that can only be used online on Saturday, December 10. The company issued a press release today in which it announces its plan to “incentivize” shoppers to buy online, “ensuring they are really getting a deal.”

Black Friday’s an exciting time of the year for the gadget hound, but let’s face facts: so many of those big box discounts are purely illusory, and you can already get an equivalent or better price through Amazon.com.

That’s why Amazon has released Price Check, a free iOS app that lets you quickly check Amazon’s price on a product by scanning barcodes, snapping a picture, saying the product’s name aloud or typing it in to search. If the price is better, you can then easily add it to your shopping cart.